The Script frontman said Alice, who wowed the crowds on Britain’s Got Talent with her rendition of Funny Valentine, didn’t cut it on the BBC show.

"In her case it was tone, she didn't have much control over her voice,” he said. “She’s about a year undercooked and needs some vocal training – there’s no shame in that.

“Maybe if I listened to Alice after seeing a dog dancing and some guy chopping off his arm then I'd go 'well, she's got talent'. It's context. If you have someone coming on with a good voice where everyone else isn't a singer then of course they're going to stand out.

"But when everyone is Olympic standard, she's not going to. That's the difference.

“She was gorgeous, a lovely looking girl, she just wasn’t up to the quality. She had talent, yes, but when you're going up against the best of the best in England, she couldn't cut it.”

“He can work wonders. For me, I wasn't into her, Jessie wasn't into her, Tom wasn't into her, Will wasn't into her. That's quite a broad range. She could prove us wrong and sell a million records but that's the game.”

The Irish rocker revealed that his life had changed enormously since he first appeared on The Voice. At the time, he was in a relationship with Lithuanian model Irma Mali, but that broke down soon afterwards and he claims to have been playing the field as single man for a year.

Now he’s looking for help with his love life from Tom Jones. “Tom needs to give me some tips on pulling. I just need to shut up. I ruin my own chances by opening my mouth.”

Speaking about his break-up with Irma, he said: “Before, I was in a relationship, it was really hard to work both worlds. Long distance relationships are hard no matter who's in them or where you are. I just have to think about me right now. I'm not saying there’s no offers coming in, but there's none that I've picked up on.”

“I’m single so I can tell the girls they are gorgeous if I want to,” he laughed. “Someone said it was like my own personal Take Me Out - except they are blind auditions so how am I supposed to do that? I can’t f***ing see them.”

And he adds cheekily: “Audition next year Nicola, you might have a chance.”

Many viewers were convinced that Danny and Bo had fallen for each other last year. She has never denied a romance, and recently admitted: “ It was a mad time and meeting someone under those circumstances is difficult.”

The Voice 'coaches' (Just don't call them judges) (Photo: BBC)

The first single from her album, Save Me, is said to have been inspired by her feelings for Danny, and contains the lyrics: Why would you wake me if you’re not going to save me?/ You made me want you when I didn’t want to.

But Danny denied any fling between him and Bo, whose album is out this week."That's bollocks. We weren't romantically involved, that's not the case.”

When he first joined the show, he was dubbed Danny I Dunno Who, because he was less well known that his fellow coaches. Now though, all that has changed.

"I'm a bit of a recluse now, I have to stay in the house because I can't go shopping or do the normal things that I used to do. It just takes so long. I’m a nice guy so I sign everything for everyone.”

The Voice has certainly provided a boost for his band, who went on tour as soon as the series finished last year. “Itbrought The Script more relevance and more into the public eye. We had reached a glass ceiling, TV was a great option for us, we had no idea of the power of TV. It's crazy. It used to be about one in ten people would know us, now it's like, everyone.”

But he is disappointed that winning artist Leanne Mitchell has failed to become a chart success. "It affects the credibility of the record label. Part of the show is creating a winner, it's not really up to the show whether she makes it or not, it's up to the label."

Danny likes the opportunities that the show gives to former stars who want another crack at fame. These have included Danny Foster from Hear’Say, Kym Mazelle from Soul II Soul, Cleo from Cleopatra Paul Carden from The Black Velvets. “These are people who had a music career and for some reason it didn't go the way they wanted it to. Having a second crack is fine. This is about shining a light on a talent that time forgot.”

Danny would like four sugars, please (Photo: Splash)

He is delighted to be attracting plenty of “credible” musicians but says if well known singers don’t make it through, they only have themselves to blame. “With people coming on and not making it – that's kind of their own fault. Either they haven't looked after their voice or they couldn't even sing in the first place but you get a rude awakening coming on the show.

“It shows up a lot of holes in the music industry – maybe ten years ago it was all about how you looked not how you sounded, whereas things have changed since then.”

Danny, 32, is convinced he’s got the winner on his team this time around. “I’ve got three artists who could become genuine stars.”

The Voice’s Danny O’Donoghue brands fellow coach Will.i.am a “f***ing idiot” during the final round of blind auditions tonight.

The Script frontman’s frustration boils over after he fills all the places on his team and can’t understand why Will fails to turn his chair for several talented acts.

In scenes to be screened on BBC1 tonight, he reaches meltdown after several singers fail to secure a mentor.

He shouts: “I am really mad at him for not turning around. I don't know why you didn't turn around? Please can you explain to me? You’re an idiot.”

But the Black Eyed Peas singer retorts: “Just because Danny is unable to pick them doesn't mean that I should hit it. I really truly believe that certain people should be with certain folk.

“Throughout the show I’ve been saying a lot of times I don’t turn around because I feel they should be with a different coach.”

During the final seconds of one audition, Danny is seen shouting: “Nobody going? That’s a shame! Oh my god!”

And after another no turn from the coaches he stands and points in turn labelling them: “Dumb, dumb, dumb.”

A show insider said “Danny is the first to fill all the places on his team so finds it desperately frustrating to have to sit back and watch amazing singers get away. He is genuinely shocked that none of the other coaches turn for some of the acts. He’s so disappointed with one act not getting through he offers his number so they can work together in future.”